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TOPIC: Ecology AIM: How are materials cycled through the environment?

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Presentation on theme: "TOPIC: Ecology AIM: How are materials cycled through the environment?"— Presentation transcript:

1 TOPIC: Ecology AIM: How are materials cycled through the environment?

2 Water Cycle Evaporation (L  G) Condensation (G L)

3 Transpiration (liquid evap from leaves)
Precipitation (rain…)

4

5

6 Involves photosynthesis & respiration
Carbon & Oxygen Cycle Involves photosynthesis & respiration oxygen Cellular Respiration Photosynthesis carbon dioxide

7

8

9 Nitrogen Cycle Transfer of N from air to soil, to living things & back to air

10 Nitrogen-fixing bacteria  convert nitrogen gas to nitrates

11 Plants use nitrates for protein synthesis

12 Animals eat plants (produce nitrogenous wastes = urea & ammonia)

13 Decomposers break down nitrogenous wastes and dead plants and animals  release ammonia into soil

14 Nitrifying bacteria convert ammonia into nitrates

15 Plants use the nitrates OR
Denitrifying bacteria converts nitrates to nitrogen gas

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